package com.example.lovewallpaper;

import android.content.Context;
import android.util.AttributeSet;
import android.view.GestureDetector;
import android.view.GestureDetector.SimpleOnGestureListener;
import android.view.MotionEvent;
import android.view.View;
import android.widget.ScrollView;

public class FirstScrollView extends ScrollView {

	private boolean canScroll;
    private GestureDetector mGestureDetector;
    View.OnTouchListener mGestureListener;

    @SuppressWarnings("deprecation")
	public FirstScrollView(Context context, AttributeSet attrs) {
            super(context, attrs);
            mGestureDetector = new GestureDetector(new YScrollDetector());
            canScroll = true;
    }

    @Override
    public boolean onInterceptTouchEvent(MotionEvent ev) {
            if (ev.getAction() == MotionEvent.ACTION_UP)
                    canScroll = true;
            return super.onInterceptTouchEvent(ev)
                            && mGestureDetector.onTouchEvent(ev);
    }

    class YScrollDetector extends SimpleOnGestureListener {
            @Override
            public boolean onScroll(MotionEvent e1, MotionEvent e2,
                            float distanceX, float distanceY) {
                    if (canScroll)
                            if (Math.abs(distanceY) >= Math.abs(distanceX))
                                    canScroll = true;
                            else
                                    canScroll = false;
                    return canScroll;
            }
    }
}